Abstract

A study on creep behavior of an aluminized Ni-based single-crystal super alloy was carried out at intermediate and high temperatures. In general, the creep rupture lives of aluminized specimens were shorter than those of bare specimens. It was also found that the specimens with a (100) side-surface showed longer creep rupture life than the specimens with a (110) side-surface. This means that anisotropy of the secondary orientation, which is normal to the primary orientation, occurred. The anisotropic creep behavior of the aluminized specimen was induced by a different arrangement of {111} <101> slip systems between the two side-surfaces.

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